MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256437731d38435967d9f8d51176bc0fc797451a0b526942eb822cdea88e32a2a93
MD51e2cbf78e8d7ba36df9342a82364e9e8
File Typerar
Size2.4 KB
First Seen2025-06-18
File NameOFFER REQUEST.rar
TagsMassLogger, rar

Malware Family: MassLogger

MassLogger, email keylogger'dır.

TypeInfostealer
Programming LanguageC#/.NET
Target PlatformWindows
C2 ProtocolSMTP/FTP
PurposeEmail keylogger
First Seen Year2020

Threat Indicators (IOC)

  • SHA256: 437731d38435967d9f8d51176bc0fc797451a0b526942eb822cdea88e32a2a93
  • MD5: 1e2cbf78e8d7ba36df9342a82364e9e8

You can verify all hash values of this sample on VirusTotal.

System Cleanup Guide

  1. Disconnect the system from the network immediately
  2. Yeni bir cihazdan banka hesabı, sosyal medya ve e-posta şifrelerini değiştirin
  3. Move crypto wallets to a new address and abandon the old ones
  4. Start a full scan with up-to-date antivirus
  5. Clear saved browser passwords and enable 2FA
  6. Sign out of all sessions on every affected service

YARA Rule Hints

rule MassLogger_SHA256 {
    meta:
        description = "MassLogger sample: 437731d38435967d"
        threat_level = "medium"
        first_seen = "2025-06-18"
    condition:
        hash.sha256(0, filesize) == "437731d38435967d9f8d51176bc0fc797451a0b526942eb822cdea88e32a2a93"
}

MassLogger — Malware Profile

MassLogger credential stealer. PT2600000043.js Portekiz fatura lurü. CommonJS obfuscation. dispatch configuration data.

Malware Type
Infostealer
Programming Language
C#/.NET
C2 Protocol
SMTP/FTP
Target Systems
Windows

Capabilities & Behavior

Tarayıcı Kimlik Bilgileri
Çerez Hırsızlığı
Kripto Cüzdan Çalma
Sistem Bilgisi
Ekran Görüntüsü
FTP/SSH İstemci Şifreleri
E-posta İstemcisi Çalma
Veri Sızıntısı

IOC List (2 indicators)

IOC — MassLogger
# SHA256 437731d38435967d9f8d51176bc0fc797451a0b526942eb822cdea88e32a2a93 # MD5 1e2cbf78e8d7ba36df9342a82364e9e8
TypeValueNote
sha256 437731d38435967d9f8d51176bc0fc797451a0b526942eb822cdea88e32a2a93 Sample:MassLogger
md5 1e2cbf78e8d7ba36df9342a82364e9e8 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi